LEAVES 33 



CHAPTER VI 



LEAVES. II 



THE several leaves studied in the last chapter were, we 

 may say, typical foliage leaves. They all possessed distinct 

 blades and petioles, and most of them possessed stipules. 

 The blades also possessed distinct upper and distinct lower 

 surfaces. The leaves to be studied in this chapter differ 

 from typical leaves while still serving as foliage. 



I. Take a piece of the stem of a Chrysanthemum bearing 

 several leaves and notice : 



1. That the leaf blades are attached directly to the stem, 



there being no petiole. Such a leaf is said to be 

 sessile or " sitting." 



2. The general shape, shape of apex, etc. 



3. The venation. 



4. Make a sketch. 



II. Examine the leaf of the Bellwort ( Uvularia perfoliata) 

 and notice : 



1. The general shape, etc. 



2. The venation. 



3. The absence of petiole and stipules. 



4. The clasping base completely encircling the stem. Such 



a leaf is said to be perfoliate. 

 q. Make a sketch to show these characters. 



